Flying is only safer than driving until the fuel runs out, then you’re much safer in a car 😉

I’m not sure, but I think you’d just need to create a script which stops them, runs the backup, and then restarts them.

Some people would say that you’re doing something wrong by using Duplicati, because they’ve had problems restoring data and it’s very slow, so if you’ve never had to restore data before you should test that to check that it works, and maybe switch to something else like Borg to be safe.

Also, backing up the folder without stopping the containers first might result in any backed up databases being corrupt, so if you’re running anything that uses databases, you should stop those containers before backing up the folder.

They mean Smart TVs. My Dad’s Samsung TV has a Plex app, but no way to install anything like Kodi that would let him use Jellyfin instead of Plex to serve media.